Glowing parts more info inside, may you help me please?

Hello, my question is not very about scripting more about building (maybe the thing i want have script i dont know)

im trying to make a glowing parts like this: http://s28.postimg.org/shgsckhst/Roblox_Screen_Shot05302014_195047085.png (Pic taken from Club Galaxy)

and when i try to do it i get this: http://s28.postimg.org/xr7yymxwd/Capture.png

so my question is how do i do my parts like in the first image?

please don't down vote.

Thanks for all the helpers!!